2019 Toyota Highlander Powertrain & Transmission Problems

Loud whining noises from transmission, repeated unpredictable shifts making pulling out/merging unsafe

I own a 2019 Highlander at just barely over 55,000 miles. I began hearing a humming noise while accelerating and brought it into Toyota. They told me that bearings are worn in the transmission and I need a new transmission replacement, which will cost $11,569.21. I am shocked Toyota has not issued a recall and corrected this well-known issue. I am disappointed in Toyota, being a loyal customer over the years, if they can't guarantee quality or assist in the issue they know about, I will not trust Toyota again.

My Wife drove to work yesterday with no issues. After her shift she stops at the local gas station by her job, she puts the car in park but the car continues to roll forward( as if it was in neutral). Applies the brake and puts the E-brake on(car is now stationary). Puts in some gas, turn car back on, puts in drive and the car is makes a grinding like noise. We get the car towed home, jack it up, drain the fluid. The color of the fluid was darkish but still had a reddish tone to it, very slight sparkle look to it..didn’t see or feel any metal shavings to it.. highly confused on what failed for the transmission to be like that. Haven’t gotten it to the shop yet but a lot of research is showing something internal. No leaks, maintenance has always been serviced on time.

At 138,000 miles my 2019 Toyota Highlander's transmission failed. I noticed a whining sound when I pushed on the accelerator, so I scheduled a service appointment to have it looked at. The day I brought it into the mechanic it began stalling at stop signs. I was driving my children to school when the vehicle began stalling, fortunately I was able to get it looked at that day. My local mechanic diagnosed it as a failed transmission having to do with something inside the transmission. I called Toyota and they said in order to qualify for support through their service program I needed to have the vehicle diagnosed by at a Toyota dealership. I had the vehicle towed to the dealership, where they too confirmed the transmission had failed due to something inside the transmission, which they diagnosed with a telescope. They quoted me 12K for a new transmission! I had routine maintenance performed throughout the life of the vehicle, primarily at the Toyota Service Center. Just 20 months prior to this happening I had the suggested transmission services completed at the dealership. The only services I had completed outside of the dealership over the last 20 months were regular oil changes and tires. The transmission in my 2019 Highlander is the same failed transmission as the ones in the 2017-2018, which Toyota issued a bulletin on, the same transmission Toyota has received numerous complaints about. The same transmission with hundreds of other customer's have filed incident reports on. The transmission they knew was problematic yet continued to put into new vehicles. I've been a loyal Toyota customer, this is my 5th Toyota. I can't believe that there is nothing Toyota is willing to do to support their customers. I thought Toyota prides itself on being a trusted brand with loyal customers, because they make vehicles that last and take care of them when they don't. I was wrong.

The contact owns a 2019 Toyota Highlander. The contact stated that while attempting to start the vehicle, there was an abnormal grinding sound coming from the vehicle. No warning lights were illuminated. The vehicle was taken to an independent mechanic, where it was diagnosed with transmission failure. The independent mechanic replaced the transmission fluid; however, the failure reoccurred. The vehicle was towed back to the independent mechanic, where it was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. The contact was informed that parts were on back order. The manufacturer was made aware of the failure, and a case was filed. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 128,669.

Transmission began making a whining noise around 70,000 miles. Transmission completely failed at 90,000 while driving on the highway and lost all forward gears and neutral. Only reverse gear works.

Transmission failed at early miles around 90k

I have been hearing a high pitched whirling noise. I took it to my dealership and the diagnostic report said it was an internal transmission problem. They said there was no code identified when they ran the diagnostic test, but they could also hear the noise. There were no other symptoms of an issue other than the noise I heard. I have done all scheduled maintenance for this car since I leased, then purchased it in 2019. When I researched the issue further, I found that vehicles from 2019 are known to have been built with faulty transmissions. I did not know this at the time of purchase.

I heard Whining Noise from Drivetrain side under Engine Room first time about a month ago. There is a possibility sure It was generated early that Noise longer than when I heard it. and I visited Toyota Dealership Vacaville CA about this issue, Requested to Diagnosis my Highlander 2019 XLE Gas type Vehicle. Technician said, "FOUND WHINE COMING FROM TRANSAXLE ASSEMBLY INDICATING INTERNAL FAILURE". Service Advisor recommended to replace "UA80E TRANSAXLE ASSEMBLY + TORQUE CONVERTER AND RECHECK". And I found Issue about There is a Document (TSB 0008-21) about this my Highlander 2019 XLE. I did not receive any information or recall or contact from TOYOTA until When I realized it.

Transmission began making high pitch whining sound with hard shifting to second gear. Within one year the transmission completely went out and was stuck in third gear.

I’m concerned that my transmission was defective. My vehicle has 94K miles and was told by dealer I needed a new transaxle. We have never used our vehicle to tow or ever been stuck. It just doesn’t make sense why it would be defective. I was able to locate a Toyota bulletin regarding this.

My Toyota was just in the shop for 100,000 mile service and investigation of whining noise upon acceleration. Was notified that the transmission needs replaced and will cost over $7500 . Transmissions are supposedly on back order. Upon further investigation, discovered there is a known issue with 2017-2019 Highlander transmissions that Toyota failed to issue a recall and failed to notify owners of these models. Repairs have not been made as transmissions are on backorder due to the magnitude of the issue.

Transmission starting making a whining noise failing at 106,950 miles. Inspection by transmission shop shows issue related to UA80E/F transmissions. Concerns or increased inspection for transmission were never mentioned during prior maintenance with dealerships or any notices sent out to owners. No warnings or codes recorded on system ECO. •Toyota Tech Tip T TT 0410 •Bulletin T SB 0160 18 •Bulletin T SB 0008 21 •Bulletin T SB 0122 20 •Bulletin T SB 0087 23

On Sunday, February 1st 2026 during sub-freezing temperatures The vehicle's 8-speed automatic transmission (UA80) experienced a complete mechanical failure while driving. This resulted in a sudden and total loss of vehicle propulsion, requiring the car to be towed. Prior to the failure, the vehicle's AWD system indicator light was illuminated. The failure was diagnosed by Alexandria Toyota on February 3rd of 2026 as a catastrophic internal transmission failure requiring full replacement of the transmission Assembly with cooler (see attached quote). This defect causes an unreasonable safety risk by potentially stranding the vehicle in moving traffic or causing a crash due to unexpected loss of power.

1. What component or system failed or malfunctioned? System: Power Train: Automatic Transmission Specific Component: UA80 8-Speed Automatic Transmission (Internal Failure) Available for Inspection: Yes, the vehicle is currently available. 2. How was your safety or the safety of others put at risk? While merging onto the highway, the transmission failed to upshift, resulting in a sudden and unexpected loss of acceleration. The vehicle could not reach or maintain highway speeds (speed limit). This created an immediate hazard as I was unable to keep up with the flow of traffic, forcing me to make an emergency exit across multiple lanes while moving significantly slower than other vehicles. The loss of motive power increased the risk of a high-speed rear-end collision. 3. Has the problem been reproduced or confirmed by a dealer? Yes. The problem was confirmed by Heritage Toyota Service. The technicians confirmed an internal transmission failure. A secondary consultation with a transmission specialist (AAMCO) also identified the failure as a known mechanical defect common to this transmission model. 4. Has the vehicle been inspected by the manufacturer... or others? Yes, it has been inspected by the authorized Toyota Dealership listed above. I have also reported the issue to Toyota Brand Engagement (National), but a corporate field inspection (DSPM) has not yet been performed. 5. Were there any warning lamps... or other symptoms? Symptoms: A distinct whining noise from the engine/transmission area that increased with vehicle speed. Prior Events: The vehicle was taken to the dealer specifically for this noise. The dealer performed a fluid change and released the vehicle. The catastrophic failure (loss of power) occurred less than 24 hours after leaving the dealership. No dashboard warning lights illuminated prior to the loss of power.

Vehicle experienced sudden loss of power and severe hesitation from a stop. Acceleration is extremely weak from approximately 0–20 mph, then returns to normal once moving. Traction control system automatically disables itself and check engine light illuminates. Vehicle feels unsafe when pulling into traffic or intersections due to delayed acceleration. Diagnostic trouble codes retrieved: P0740 (Torque Converter Clutch Actuator Stuck On), P0745 (Pressure Control Solenoid A Stuck Off), and P2713 (Pressure Control Solenoid D Stuck Off). Dealer recommended full transmission replacement costing over $11,000 at only 79,000 miles. Dealer stated this failure is common on this model. Similar failures have been reported by other owners of Toyota vehicles equipped with the UA80 8-speed automatic transmission. No recall currently exists for this issue. This condition presents a safety concern due to delayed acceleration when entering traffic and loss of traction control functionality. Vehicle is being driven minimally until repaired.

The transmission is whining and is going out it is shifting hard now.

My 2019 Toyota Highlander started making a whining noise from 0mph to 40mph-- and at times would shift hard. I took it to first mechanic who stated it was definitely a transmission issue. I took it to a transmission shop who also confirmed it was a transmission issue. I had vehicle towed to Toyota Dealer who performed a Multipoint Inspection and vehicle was placed on a scanner. The codes indicated "internal failure" on transmission and quoted me $10,500 to remove and replace. Parts are backordered for 8 weeks+. Current transmission is only at 63,000 miles and I am the 2nd owner.

Transmission failed catastrophically at 133,000 miles while vehicle was in operation at a busy intersection. Vehicle became immobilized and unable to move. Unable to safely exit vehicle due to traffic. Stranded for 60-90 minutes with multiple vehicles nearly striking the disabled vehicle, creating a serious safety hazard. Police were called but failed to show up. Prior to failure: Vehicle exhibited loud whining noise during initial startup that would sometimes lessen or stop. This symptom appeared sometime within the last 1,000 miles of operation. Toyota dealer service at 132k miles noted transmission fluid was "Ok" during routine maintenance. At 133k miles transmission failed catastrophically. Independent transmission service center reports burnt-smelling transmission fluid indicating severe thermal damage and transmission failure. Problem confirmed by two independent service centers. Transmission is available for inspection upon request. Vehicle is not drivable.

Ua80 transmission failed.